Improvement in machines for drying sized paper



N. W. TAYLOR & J. W. BRIGHTMAN.

MACHINE FOR DRYING SIZED PAPER.

No. 35,117. Patented Apr. 29, 1862.

UNITED STATES PATENT OFFICE.

N. VJ. TAYLOR AND J. \V. BRIGIITMAN, OF CLEVELAND, OHIO.

IMPROVEMENT IN MACHINES FOR DRYING SIZED PAPER.

Specification forming part of Letters Patent No. 35,117, dated April 29,1862.

T0 aZZ whom, it may concern:

Be it known that we, N. \V. TAYLOR and J. V. BRIGHTMAN, of Cleveland, inthe county of Cuyahoga and State of Ohio, have invented a new andImproved-SizedPaper Drier; and we do hereby declare that the followingis a full and complete description of the construction and operation ofthe same, reference being had to the accompanying drawings, making apart of this specification, in which-- Figure 1 is a side view. Fig. 2is a top view. Fig. 3 is a view of the end D. Fig. 4.is aview of the endD. Fig. 5 is a side view. Fig-6 is a vertical section in the directionof the line :1; w in Fig. 2. Fig. 7 is a vertical section in thedirection of the line 00 0c in Fig. 5.

The same letters of reference refer 1o corresponding parts in thedifferent views.

Our improvement relates to an apparatus by means of which sized or wetpaper is first subjected to a moist-heated atmosphere and then conveyedgradually into an atmosphere of increased heat and dryness until itpasses out of the dryer.

A represents the frame of the drier, with lids or doors B B on one side.

0 is afurnace below, with an annular heater, the heated air from thefurnace being c011- veyed through the pipes E E up into the lowerchamber, a, of the drier, as indicated by the arrows in Fig. 6.

The drier is divided oil into chambers a I) c d e f by partitions orplates R, in each of which are two long narrow openings, a b, for thepassage of heat from one chamber to another, producing a current throughthe drier. At alternate ends of these partitions are rollers M N O P, bymeans of which the paper is carried from one chamber to another, and itis conveyed in and out of the drier by similar rollers, S and T, on theoutside. These rollers are all operated by pulleys on the ends of theirshafts and an endless belt, as shown in Fig. 5, 1; being thedriving-pulley. The paper is guided and carried through the chambersbyanumber of small rollers, m n 0, supported by frame-work, the rollersa in the center being elevated above the others. The paper passes fromthe reel and is carried into the sizing-trough under a roller, and fromthence over the roller 5 through the opening H in the end of the drier,over the small roller 0, un-

. der the roller 02, over m, and round the roller M into the nextchamber below, and so on through all the chambers until it passes out atthe opening L and under the roller T, as indicated by the red lines inFig. 6. The doors B B can be opened to guide the paper right at firstover the rollers, or to arrange it if it gets out of order or broken.The heated air from the furnace passes along the pipes E E into thelower chamber, a, up through the openings at I) under the paper, and asthe partitions fit closely to the sides of the drier the heated aircannot ascend directly, but must pass back again over the top of thepaper, up through the narrow openings in the center of the nextpartition into the chamber above, as indicated by the arrows in Fig. 7,and so 011 through all the chambers until it passes out at the openingsJ J in the top of the drier, which correspond to the openings a Z) inthe partitions. In this way the heated air comes directly under, around,and above the paper, bringing both surfaces in contact with the heatedair about the same time, drying it well and rapidly. The openings a band J J produce a continued current through the drier, causing theheated air to ascend constantly and uniformly. There is moisture orsteam generated in the chambers from the dampness of the paper, whichrises to the top, so thatthe wet paper from the sizer first comes incontact with a moist and heated atmosphere, and gradually into a dryeratmosphere, giving the paper sui'licient time to absorb the sizing, forif paper immediately after it is sized is brought into a dry hotatmosphere before the size is absorbed the size becomes dried on thesurface,rendering it hard and horny and not fit for use aswriting-paper. \Vhen paper is passed over rollers in a verticaldirection and the heat is applied at the bottom, the paper passesalternately from a heated to a moist atmosphere, and the weight of thepaper as it is suspended in a vertical or inclined direction is veryliable to break it, and when broken cannot easily be arranged over therollers, as some of them are so elevated; but with our arrangement thesedifficulties are entirely overcome, the paper passes gradually from amoist to a dryer atmosphere, being uniformly and rapidly dried, and asitpasscs over rollers horizontally paper in drying.

and is supported by them it is not so apt to be broken or injured in anyway; The lids F and F by the rollers S and T, (shown in Figs. 2 and 3)can be raised to aid in putting the paper in and out of the drier. Thepulleys on the rollers S M N O P are successively larger in the order inwhich they are named, so as to give the rollers a slower motion in orderto compensate for the shrinkage of the Otherwise the very act. ofshrinkage, where the bearing-rollers moved with the same velocity,'willrend the paper.

What we claim as our improvement, and desire to secure by LettersPatent, is

1. The herein-described construction of a drier, consisting of aninclosed chamber provided with suitable openings, for the purposesspecified, and which can be closed at pleasure, and having Within saidchamber the bearing-rollers placed in horizontal rows, and thesuccessive sets so arranged in relation to each other and the points ofintroduction for the paper and the heated air that the paper will passcontinually from a moist to a dry and heated atmosphere, as and for thepurpose specified.

2. Moving the rollers S MN 0 Pat decreasing velocities, for the purposeset forth.

3. The plates R and openings 0, 5', arranged as and for the purposedescribed.

N. W. TAYLOR. J. V. BRIGHTMAN.

Witnesses:

S. H. MATHER, J. BRAINERD.

